Rasa

Rasa is a self-hosted conversational AI platform for building chat and voice agents, made for engineering-led teams; Enterprise is sold by quote.

Rasa gives a company the tools to build its own customer-facing AI agents and run them on infrastructure it controls. Rasa Technologies, Inc., an independent company based in San Francisco with research and development in Berlin, develops it. Its story began in 2016 with Rasa NLU, and today's Rasa Platform is built around a dialogue engine called CALM. Teams write business processes as flows, and CALM starts the right flow from its description. An agent therefore works through steps the business has written down, such as the questions a money transfer needs. Rasa Studio is the no-code side of the platform. Its flow builder adds messages, collect steps, custom actions and logic branches, and version history records each edit. Conversation Review replays real conversations beside their details and exports them to CSV. The Analytics dashboard tracks volume, containment, latency and CSAT. The Rasa Pro runtime adds the Enterprise Search Policy, which answers from documents held in a vector store, and the Response Rephraser, which sets the assistant's tone. Agents reach customers through the open source Rasa Chat Widget and the Twilio connector for SMS and WhatsApp. Voice channels and a REST API cover phone lines and custom front ends. Rasa suits enterprises that need to own their AI agents and keep conversation data on their own systems. Banks, telecom operators, healthcare providers and government bodies are typical examples. Engineering-led AI product teams are the core users; engineers work in code, and Studio opens flow editing to the rest of the product team. Developers can start on the Developer Edition, a free licence that runs locally or in production with help from the community forum. Larger deployments move to Enterprise, which adds the full platform and premium support and is licensed through the sales team. Typical jobs are customer support, sales enablement and internal assistants that answer staff questions from company documents. Contact centres put the same agent on the phone through Twilio Voice or AudioCodes VoiceAI Connect. Teams deploy it on Kubernetes with Helm and reach business systems through custom actions and MCP servers. Rasa fits organisations that want their chat and voice agents written, versioned and hosted like the rest of their software.